Build A Full Web Chat App From Dvs Web Infotech

• Instructor: satnamkhowal
• Lectures: 11
• Quizzes: 3
• Duration: 10 weeks

Introduction

In today’s digital world, real-time communication is essential. Whether for business, personal use, or customer service, a web chat application enhances user experience and engagement. In this blog, we will guide you through building a full-featured web chat app using modern technologies. At DVS Web Infotech, we specialize in creating scalable, real-time applications, and we’ll walk you through the key steps to develop your own chat app.

Technologies Used

To build an efficient and scalable web chat application, we will use the following technologies:

• Frontend: React.js / Vue.js
• Backend: Node.js with Express.js
• Database: MongoDB (NoSQL for storing messages)
• WebSockets: Socket.io for real-time communication
• Authentication: JWT (JSON Web Token) for user login
• Hosting: Firebase or AWS for deployment

Step 1: Setting Up the Backend

1. Install Dependencies

Create a new Node.js project and install necessary dependencies:

mkdir chat-app-backend && cd chat-app-backend
npm init -y
npm install express socket.io mongoose cors dotenv jsonwebtoken bcryptjs

2. Configure Express Server

Create an index.js file:

const express = require('express');
const http = require('http');
const socketIo = require('socket.io');
const cors = require('cors');

const app = express();
const server = http.createServer(app);
const io = socketIo(server, { cors: { origin: '*' } });

app.use(cors());
app.use(express.json());

io.on('connection', (socket) => {
    console.log('New user connected');
    socket.on('sendMessage', (message) => {
        io.emit('receiveMessage', message);
    });
    socket.on('disconnect', () => {
        console.log('User disconnected');
    });
});

server.listen(5000, () => console.log('Server running on port 5000'));

Step 2: Setting Up the Database

1. Configure MongoDB Connection

Install MongoDB and configure the connection in db.js:

const mongoose = require('mongoose');
const connectDB = async () => {
    try {
        await mongoose.connect(process.env.MONGO_URI, { useNewUrlParser: true, useUnifiedTopology: true });
        console.log('MongoDB Connected');
    } catch (error) {
        console.error(error);
    }
};
module.exports = connectDB;

2. Create a Message Model

const mongoose = require('mongoose');
const MessageSchema = new mongoose.Schema({
    sender: String,
    message: String,
    timestamp: { type: Date, default: Date.now }
});
module.exports = mongoose.model('Message', MessageSchema);

Step 3: Building the Frontend

1. Install React and Dependencies

npx create-react-app chat-app-frontend
cd chat-app-frontend
npm install socket.io-client axios

2. Create Chat Component

Create Chat.js in the src folder:

import React, { useState, useEffect } from 'react';
import io from 'socket.io-client';

const socket = io('http://localhost:5000');

const Chat = () => {
    const [message, setMessage] = useState('');
    const [messages, setMessages] = useState([]);

    useEffect(() => {
        socket.on('receiveMessage', (msg) => {
            setMessages([...messages, msg]);
        });
    }, [messages]);

    const sendMessage = () => {
        socket.emit('sendMessage', message);
        setMessage('');
    };

    return (
        <div>
            <h2>Chat Room</h2>
            <div>{messages.map((msg, index) => <p key={index}>{msg}</p>)}</div>
            <input value={message} onChange={(e) => setMessage(e.target.value)} />
            <button onClick={sendMessage}>Send</button>
        </div>
    );
};

export default Chat;

Step 4: Authentication System

1. Create User Model

const UserSchema = new mongoose.Schema({
    username: String,
    password: String
});
module.exports = mongoose.model('User', UserSchema);

2. Implement Login and Signup

const bcrypt = require('bcryptjs');
const jwt = require('jsonwebtoken');
const User = require('./models/User');

const register = async (req, res) => {
    const { username, password } = req.body;
    const hashedPassword = await bcrypt.hash(password, 10);
    const newUser = new User({ username, password: hashedPassword });
    await newUser.save();
    res.json({ message: 'User registered' });
};

const login = async (req, res) => {
    const { username, password } = req.body;
    const user = await User.findOne({ username });
    if (!user || !(await bcrypt.compare(password, user.password))) {
        return res.status(400).json({ message: 'Invalid credentials' });
    }
    const token = jwt.sign({ id: user._id }, 'secret', { expiresIn: '1h' });
    res.json({ token });
};

Step 5: Deploying the Chat App

1. Deploy Backend

Use Heroku or AWS to deploy your backend.

git init
git add .
git commit -m "Deploy chat backend"
git push heroku main

2. Deploy Frontend

Use Vercel or Netlify for frontend deployment.

npm run build
netlify deploy

Conclusion

Congratulations! You have successfully built a full web chat app with real-time messaging, authentication, and database integration. At DVS Web Infotech, we specialize in modern web application development, ensuring security, scalability, and performance.

Start your journey today and build amazing applications with real-time communication!